半导体激光抽运Dy:YAG黄光激光器

Laser Diode Pumped Dy:YAG Yellow Laser

报道了一种新型小体积的半导体激光端面抽运国产Dy…YAG单晶的黄光激光器。根据Dy…YAG激光晶体的特殊能级结构,采用半导体激光抽运,利用~4 F_(9/2)→~6 H_(13/2)的能级跃迁,室温下直接获得582.7nm的黄光激光。抽运源采用蓝光LD,通过温控系统调节LD的工作温度,优化中心波长至447.3nm,从而实现抽运光波长与Dy…YAG晶体吸收谱线的较好匹配。在吸收抽运功率为1.4W的条件下,输出黄光激光的平均功率为56mW,最大单脉冲能量达到1.1mJ,对应的光光转化效率为4%,斜率效率为5%。

A new miniature diode-end-pumped Dy∶YAG yellow laser based on the domestic single crystal is reported. According to the special energy structure of Dy∶YAG laser crystal, the yellow laser of 582.7 nm on the 4F9/2→6H13/2 transition is obtained using laser diode pump at room temperature. In order to matching the pump wavelength with the Dy∶YAG crystal absorption peak, the blue LD is used as the pumping source, and the center wavelength is optimized at 447.3 nm by tuning the LD operative temperature. With a total incident pump power of 1.4 W, the yellow laser maximum output power of 56 mW is achieved. The maximum single pulse energy is up to 1.1 mJ. The optical-to-optical conversion efficiency is 4% and the slope efficiency is 5%.